Managing form entries - archive 'completed' entries

Hello, im looking at using gravity forms for a basic order system.
I want to know, how could i manage orders in the backend.

I see there is an entries page that shows:
All | unread | Starred | Trash

But after a while, this could contain hundreds of entries (hopefully!)
Ideally i need a way to mark entries (orders) as complete, so they dont show on the main screen, but can be accessed latter if needed, like:
All | Pending Orders | Completed Orders | unread | Starred | Trash

One solution would be to add a hidden field of 'Status' to the form, which can be changed latter, but the screen would still list all.

Great, that should do the trick.

Also, is it possible to have a hidden field value populate from another (visable) field?

I want to save orderform details to a post - then i need to get the info from a priceing field into a custom field.

Im playing with the live demo now, but cant see how this is possible.
I gather i need to use a pricing field for the form to work properly with paypal, but how do i save info from a pricing field to post data?

Is this possible?